I'm
not sure if this is the reason why Windows Live Mobile Messenger continues to
fail working proper for some Windows Mobile users,
as reported before Christmas, but over at
MoDaCo, users reports of a new message they see if the use Windows Live
Mobile Messenger from their Windows Mobile devices, noticing the following:

"Hello! Starting today, your 30 day trial period beings. By selecting OK you
acknowledge that your use of Windows Live services continues to be subject to
the Terms of Use and Privacy Statement. Data charges from your mobile operator,
including roaming fees may apply for using the Windows Live services. At the
conclusion of this trial, you will be given the option to purchase a 30 day pass.":

7.4 Trial Period Offers. You may have received a limited time of free service
or some other trial period offer. Unless we notify you otherwise, if you are
participating in any trial period offer, you must cancel the service by the end
of the trial period to avoid incurring charges. If you do not cancel your
service, and we have informed you that the service will automatically be
converted into a paid subscription at the end of the trial period, then you
authorize us to charge your payment method for the service.

Interesting enough that 7.4 doesn't exists in the German Terms and
Conditions?

Have you seen the same trial period message on your device? If so, let us
know in the comments bellow - together with information about your device,
network and country. If you was able to snap a screenshot, please let me know.

UPDATE: I've dropped my contacts at Microsoft an E-Mail and expect to get a feedback from Microsoft soon. Stay tuned for more information.

UPDATE: Okay, we have an official feedback from Microsoft's Windows
Live department and this says, that Windows Mobile users shouldn't seen this
trial notice yet but Nokia S60 users in the UK and Sweden only:

"This week we rolled out a direct-to-consumer billing service for the Windows
Live client on select Nokia S60 handsets in Sweden and the UK. Although we are
considering doing the same at a future time for Windows Mobile, this has not
been implemented. Windows Mobile customers shouldn't have seen any notifications
of a 30-day trial and we are working to correct this. Traditionally, customers
have been billed by their mobile operators for many of these services, either
directly or through their data package."